21822257316 has 12 divisors (see below), whose sum is σ = 50918600432. Its totient is φ = 7274085768.

The previous prime is 21822257251. The next prime is 21822257333. The reversal of 21822257316 is 61375222812.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 909260710 + ... + 909260733.

Almost surely, 2^21822257316 is an apocalyptic number.

It is an amenable number.

21822257316 is an abundant number, since it is smaller than the sum of its proper divisors (29096343116).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21822257316 is a wasteful number, since it uses less digits than its factorization.

21822257316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1818521450 (or 1818521448 counting only the distinct ones).

The product of its digits is 80640, while the sum is 39.

The spelling of 21822257316 in words is "twenty-one billion, eight hundred twenty-two million, two hundred fifty-seven thousand, three hundred sixteen".